INVERSE QUANTIZATION AND INVERSE DISCRETE COSINE TRANSFORMATION PROCESSOR USING EFFICIENT SHIFT REGISTER ARRAY

摘要

PROBLEM TO BE SOLVED: To provide a device for carrying out inverse quantization and inverse discrete cosine transformation arithmetic using an effective shift register array. SOLUTION: A disclosed exclusive IQ/IDCT processor invents an effective data shift mechanism to many register arrays to attain satisfactory trade off between the operation speed and the manufacturing cost of a circuit. This processor is useful for real-time video decoding in particular. Mounting of an IQ/IDCT circuit to a VLSI is simplified remarkably.